Why are people making lines to the Imperial Palace

Hello, travelers. This is Kumi . Picturesque Japan Blog tells you what people are doing in and around the Imperial Palace at this cherry blossoms season. If you happen to be in Tokyo and walk near the Imperial Palace, you may see people making lines like this. You'll see many Imperial Guards, too. At the first checkpoint, they inspect the visitors' bags, and then at the next checkpoint, they inspect us with a metal detector. Is there a special concert held here? No. People are visiting here to enjoy the cherry blossoms along Inui Street which is open to the public for a limited time (March 30 to April 7, 2019). Japan Times' article tells you in detail. Crowds descend upon Imperial Palace's Inui Street to see cherry blossoms https://www.japantimes.co.jp/news/2019/03/30/national/crowds-descend-upon-imperial-palaces-inui-street-see-cherry-blossoms/#.XKX_J_czaM8 The note tells you what you shouldn't do here. This is Sakashita-mon (gate...